diff --git a/ChangeLog b/ChangeLog
index 74843be2fe..608c123282 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Thu Jan  6 20:29:18 2005  NAKAMURA Usaku  <usa@ruby-lang.org>
+
+	* ext/zlib/zlib.c (zstream_end): should return value.
+
 Thu Jan  6 19:59:03 2005  Hirokazu Yamamoto  <ocean@m2.ccsnet.ne.jp>
 
 	* win32/win32.c (rb_w32_close): didn't close socket handle.
diff --git a/ext/zlib/zlib.c b/ext/zlib/zlib.c
index 1d4ce6d680..90f4d22fa9 100644
--- a/ext/zlib/zlib.c
+++ b/ext/zlib/zlib.c
@@ -682,7 +682,7 @@ zstream_end(z)
 	if (RTEST(ruby_debug)) {
 	    rb_warning("attempt to close uninitialized zstream; ignored.");
 	}
-	return;
+	return Qnil;
     }
     if (z->flags & ZSTREAM_FLAG_IN_STREAM) {
 	if (RTEST(ruby_debug)) {